Bug 865228 - Slide tabs button all the way off screen (r=mfinkle)
Bug 865228 - Only animate tabs counter once tabs button is on screen (r=mfinkle)
Bug 865228 - Remove unnecessary views from toolbar animation (r=mfinkle)
Bug 865228 - Smoother fade-in animation when coming from awesomescreen (r=mfinkle)
Bug 865228 - Hide stop/reader buttons immediately when entering awesomescreen (r=mfinkle)
Bug 865228 - Rename mAnimateSiteSecurity to mSwitchingTabs (r=mfinkle)
Bug 865228 - Don't animate forward button when switching tabs (r=mfinkle)
Bug 866466/867141 - Don't nullify mPanel reference when closing tabs panel (r=mfinkle)